Add Subclass Feature Effect - Bladesong

This item is to replicate the effects of the Wizard Bladesinging Arcane Tradition subclass feature: Bladesong. Simply equip it when the class feature is activated and unequip it when it ends. Subclass feature details:

Starting at 2nd level, you can invoke a secret elven magic called the Bladesong, provided that you aren’t wearing medium or heavy armor or using a shield. It graces you with supernatural speed, agility, and focus.

You can use a bonus action to start the Bladesong, which lasts for 1 minute. It ends early if you are incapacitated, if you don medium or heavy armor or a shield, or if you use two hands to make an attack with a weapon. You can also dismiss the Bladesong at any time you choose (no action required).

While your Bladesong is active, you gain the following benefits:

* You gain a bonus to your AC equal to your Intelligence modifier (minimum of +1).*

* Your walking speed increases by 10 feet.

* You have advantage on Dexterity (Acrobatics) checks.

* You gain a bonus to any Constitution saving throw you make to maintain your concentration on a spell. The bonus equals your Intelligence modifier (minimum of +1).

You can use this feature twice. You regain all expended uses of it when you finish a short or long rest.

Starting at 14th level, you add your Intelligence modifier (minimum of +1) to the damage of your melee weapon attacks while your Bladesong is active.

Notes: Bonus: Armor Class, Bonus: Speed, Bonus: Constitution Saving Throws, Advantage: Acrobatics